The fact that there was no unified spelling for the surname Gdd when the first surnames were formed allows us to find many surnames similar to Gdd.
Not all surnames similar to the surname Gdd are related to it. Sometimes it is possible to find surnames similar to Gdd that have a different origin and meaning.
Errors in writing, voluntary changes by the bearers, modifications for language reasons... There are many reasons why the surname Gdd may have undergone changes or modifications, and from those modifications, surnames similar to Gdd may have appeared, as we can see.